The imposing Walls of Ávila 11th-14th centuries, the medieval work was started in 1090 The fenced area is of 31 hectares with a perimeter of approximately 2,516 meters, 88 blocks or semicircular towers, 2,500 merlons, paintings by 3 m thick, an average. The imposing Walls of Ávila 11th-14th centuries, the medieval work was started in 1090 The fenced area is of 31 hectares with a perimeter of approximately 2,516 meters, 88 blocks or semicircular towers, 2,500 merlons, paintings by 3 m thick,